diff --git a/tests.sh b/tests.sh
index ce66731e08e41..148309244c517 100755
--- a/tests.sh
+++ b/tests.sh
@@ -485,7 +485,9 @@ build_php_c() {
 build_php7.0_mac() {
   internal_build_cpp
   # Install PHP
-  curl -s https://php-osx.liip.ch/install.sh | bash -s 7.0
+  curl -s https://php-osx.liip.ch/install.sh -o /tmp/php-install.sh
+  bash /tmp/php-install.sh 7.0
+  rm -f /tmp/php-install.sh
   PHP_FOLDER=`find /usr/local -type d -name "php5-7.0*"`  # The folder name may change upon time
   test ! -z "$PHP_FOLDER"
   export PATH="$PHP_FOLDER/bin:$PATH"
@@ -508,7 +510,9 @@ build_php7.3_mac() {
   # Install PHP
   # We can't test PHP 7.4 with these binaries yet:
   #   https://github.com/liip/php-osx/issues/276
-  curl -s https://php-osx.liip.ch/install.sh | bash -s 7.3
+  curl -s https://php-osx.liip.ch/install.sh -o /tmp/php-install.sh
+  bash /tmp/php-install.sh 7.3
+  rm -f /tmp/php-install.sh
   PHP_FOLDER=`find /usr/local -type d -name "php5-7.3*"`  # The folder name may change upon time
   test ! -z "$PHP_FOLDER"
   export PATH="$PHP_FOLDER/bin:$PATH"